DS does this... my answer is if you're too tired you're going to bed. He asks if he can watch a movie and I tell him nope, lights out no TV bed... he's never gone yet. When he does it when we're cleaning up (he only does it then when he's helped to completely trash the room) I tell him fine go to bed, but don't complain when I start throwing toys away instead of putting them away... he cleans.